CVE-2023-29216
📋 TL;DR
This vulnerability in Apache Linkis allows attackers to execute arbitrary code remotely by exploiting a deserialization flaw when configuring MySQL data sources with malicious parameters. All Apache Linkis installations version 1.3.1 and earlier are affected. Attackers can achieve full system compromise through this weakness.
💻 Affected Systems
- Apache Linkis
📦 What is this software?
Linkis by Apache
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with attacker gaining full control over the server, data exfiltration, lateral movement, and persistent backdoor installation.
Likely Case
Remote code execution leading to data theft, service disruption, and potential ransomware deployment.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only affecting the Linkis service itself.
🎯 Exploit Status
Exploitation requires ability to configure data sources; may require some level of access but technical complexity is low once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.2
Vendor Advisory: https://lists.apache.org/thread/18vv0m32oy51nzk8tbz13qdl5569y55l
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Download Apache Linkis 1.3.2 from official Apache repository. 3. Stop Linkis service. 4. Replace installation with 1.3.2 version. 5. Restart Linkis service. 6. Verify functionality.
🔧 Temporary Workarounds
Disable MySQL Data Source Configuration
allTemporarily disable the ability to configure new MySQL data sources to prevent exploitation.
Modify Linkis configuration to remove MySQL data source options or restrict access to configuration interface
Network Segmentation
allRestrict network access to Linkis administration interfaces to trusted IPs only.
Configure firewall rules to limit access to Linkis ports (default 9001, 9002) to authorized networks
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access Linkis administration interfaces
- Disable MySQL data source functionality entirely in configuration files
🔍 How to Verify
Check if Vulnerable:
Check Linkis version via web interface or configuration files; versions 1.3.1 or earlier are vulnerable.Check Version:
Check linkis.properties file or web interface for version informationVerify Fix Applied:
Verify version is 1.3.2 or later and test MySQL data source configuration with safe parameters.📡 Detection & Monitoring
Log Indicators:
- Unusual MySQL data source configuration attempts
- Deserialization errors in logs
- Unexpected process execution from Linkis service
Network Indicators:
- Unusual outbound connections from Linkis server
- Exploit tool traffic patterns
SIEM Query:
source="linkis" AND ("mysql" OR "datasource") AND ("error" OR "exception")